namespace KLHZ.Trader.Core.Math.Utils
{
    public static class Lines
    {
        public static (float x, float y) LinesCrossing(float k1, float b1, float k2, float b2)
        {
            var x = (b2 - b1) / (k1 - k2);
            var y = k1 * x + b1;

            return (x, y);
        }

        public static bool IsLinesCrossing(DateTime time1, DateTime time2, float val1_1, float val1_2, float val2_1, float val2_2)
        {
            var dtime = (float)(time2 - time1).TotalSeconds;

            var dval1 = (val1_2 - val1_1);
            var k1 = dval1 / dtime;
            var b1 = val1_1;

            var dval2 = val2_2 - val2_1;
            var k2 = dval2 / dtime;
            var b2 = val2_1;

            if (k1 != k2)
            {
                var cross = LinesCrossing(k1, b1, k2, b2);
                var crossingTimestamp = time1.AddSeconds(cross.x);
                return crossingTimestamp >= time1 && crossingTimestamp <= time2;
            }
            return false;
        }
    }
}